What do large crowds of people and water have in common? They both act like fluids. When crowds cheer, sway and clump ...

NPR's Ailsa Chang talks with Emily Kwong and Regina Barber of Short Wave about the fluid dynamics of crowds, an early fossil of a modern bird and new data on how people's moods change through the day.

For a long time, microbes like the ones in Yellowstone's hot springs were studied in isolation. Molecular ecologist Devaki ...